The score of Zarkana dips into trancelike drones, live drums, throat singing, organ solos, and one swampy-blues number when the clown goes to the purple bubble-wart toad planet, but you're not going to be rocking out to the soundtrack.

Chillingo, iPod & iPhone 69p, iPad £1.49 Although sorting animal faces into lines of three or more doesn't immediately sound like something you'd do for fun, Zookeeper's addictive qualities are such that protracted play induces a trancelike state in which the animals almost seem to sort themselves.

It seemed to me, in my trancelike state, that the moment in which the doorknob on the scary door began to rattle — the moment when something on the other side was on the cusp of emerging, with the mortals on this side watching in wide-eyed dread — would be a good place to end.

Saturated with color or chiaroscuro black and white, luminously grainy and non-linear, each film opens up a specific world in a dreamlike way, from the rhythms of Chinatown to the trancelike experience of a band touring and performing.